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Questions and Answers
What is the purpose of a spatial index in a geodatabase?
What is the purpose of a spatial index in a geodatabase?
- To store spatial attributes of feature classes
- To manage data and metadata in the geodatabase
- To quickly locate features when performing tasks such as panning, zooming, or selecting features (correct)
- To specify how data is stored in the geodatabase to optimize storage parameters
How are feature classes with polygon geometry stored in the geodatabase?
How are feature classes with polygon geometry stored in the geodatabase?
- As tables, with each row representing one feature (correct)
- As system tables that manage data and metadata
- As SQL spatial types that can be accessed using SQL queries
- As configuration keywords that optimize storage parameters
What is the function of system tables in a geodatabase?
What is the function of system tables in a geodatabase?
- To describe the geodatabase schema that specifies all dataset definitions, rules, and relationships
- To contain and manage all the metadata required to implement geodatabase properties, data validation rules, and behaviors (correct)
- To store spatial attributes of feature classes
- To specify how data is stored in the geodatabase to optimize storage parameters
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Study Notes
- A geodatabase is a system that stores, queries, and manipulates geographic information and spatial data.
- Tables are the basic storage objects in the geodatabase, with feature classes containing spatial attributes.
- A spatial index is used to quickly locate features when performing tasks such as panning, zooming, or selecting features.
- The geodatabase uses the spatial reference to accurately display a feature's location and carry out geoprocessing functions.
- Configuration keywords specify how data is stored in the geodatabase to optimize storage parameters.
- Feature classes with polygon geometry are stored as tables, with each row representing one feature.
- Within the geodatabase, there are system tables and dataset tables that manage data and metadata.
- System tables describe the geodatabase schema that specifies all dataset definitions, rules, and relationships.
- System tables contain and manage all the metadata required to implement geodatabase properties, data validation rules, and behaviors.
- SQL can be used to access the contents of the feature class table, including the shape when stored as a SQL spatial type.
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